May be you are looking at a different crowd and assume that they are "professionals".
What pro video productions have are:
- Scripted storytelling: making every take matched with the former shots and subsequent video editing in mind
- Streamlined video editing: workflow, editing software, color matching, time code, A/V mixers, storage, etc.
- Proactive management: personnel, experience, etc.
and finally
4. High quality and high reliability equipment: camera, light and modifiers, filters, camera support gear, gimbals for steady shots, pro audio equipment, etc.
Camera is only one tiny piece of the puzzle and honestly, in professional video work, no one gives a s##t about what camera brand to use and whether it is full-frame, 4K or 60p as long as it matches the workflow and gets the job done on time, budget and with the desired quality. If any wanna-be video pro thinks that 4K 60p is the magic bullet for video production, he/she needs to grow up quite a lot. Just saying.